roles) || in_array('administrator', $user->roles) || in_array('admin', $user->roles ) ) { ?>
probname); ?>
Topic Classification: nid, "Topic Classification"); ?> Tags: nid, "Problem Tag");?>
Topics: nid, "Topics"); ?> Prerequisites: nid, "Prerequisites"); ?>
Supplies: nid, "Supplies"); ?> Pedagogy: nid, "Pedagogy"); ?>
Grade Vs Difficulty:
  EasyModerateChallengingPerplexing
1-2
3-4
5-6
7-8
 
9-10
11-12
13-14
Solution: nid, "Solution"); ?>
Problem

Note that $2002 = 2\cdot7\cdot11\cdot13$. Find the sum of all the unit fractions that have denominators with only factors from the set $\{2,7,11,13\}$. That is, find the following sum:

$\frac{1}{2}+\frac{1}{4}+\frac{1}{7}+\frac{1}{8}+\frac{1}{11}+\frac{1}{13}+\frac{1}{14}+\frac{1}{16}+
\frac{1}{22}+\frac{1}{26}+\frac{1}{28}+\cdots$.

Details
Source Title: Euler
Authors
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References
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Reference Author Reference Title Reference URL
'; } ?>
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Problem Sets This Problem Belongs to:
parent_nid; ?> Set:
VARIABLES
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DEFINITIONS
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